Numerical controller

Abstract

Provided is a numerical controller capable of calculating an optimum feed rate in machining in which cutting is performed in a different direction from a direction of a spindle axis. The numerical controller includes a tool data storage unit for storing tool data related to a tool attached to the spindle axis, a command analyzer for reading and analyzing a command block from the machining program, and generating movement command data for relatively moving the spindle axis with respect to the workpiece and spindle axis rotation command data for rotating the spindle axis, and a cutting speed controller for calculating a recommended cutting feed rate of the spindle axis based on the tool data of the tool, and clamping a cutting feed rate of the spindle axis included in the movement command data at the recommended cutting feed rate when the cutting feed rate of the spindle axis is larger than the recommended cutting feed rate.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a new U.S. Patent Application that claims benefit of Japanese Patent Application No. 2017-059913, filed Mar. 24, 2017, and Japanese Patent Application No. 2017-112928, filed Jun. 7, 2017, the disclosure of these applications are being incorporated herein by reference in their entirety for all purposes.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]This invention relates to a numerical controller, and particularly relate to a numerical controller that controls a feed rate based on a machining condition of a cutting tool.[0004]2. Description of the Related Art[0005]Such as grooving, free-form surface machining, side milling, incline machining, etc., with using a machine tool, there is a machining method of cutting a workpiece in a different direction from a direction of the spindle axis, to which a tool such as a milling tool, an end mill tool, etc. is attached, (Japanese Patent Laid-Open No. 2016-066201...

AI Technical Summary

Benefits of technology

This solution enables precise and efficient machining by automatically adjusting feed rates to recommended values, reducing labor and errors, and maintaining machining quality across different tools and machining conditions.

Problems solved by technology

Here, when the operator erroneously sets the machining condition, and thus the one-blade feed rate exceeds the recommended value as a result, a decrease in machining quality of the workpiece, a drastic reduction in tool life, and damage to the tool may be caused.

However, there is a possibility of setting a machining condition which is not valid (does not satisfy the recommended value of the cutting condition) at the time of creating a new machining program.

In addition, in a case of changing to a tool having the same shape (different coating and maker) with respect to an existing program, there is a possibility that, as a result of performing machining without changing the machining condition without checking a recommended value of a cutting condition of a new tool, machining not satisfying the recommended value of the cutting condition of the tool may be performed.

Further, there is a possibility of performing machining not satisfying the recommended value of the cutting condition of the tool since the operator changes the number of revolutions of the spindle axis before machining or changes the number of revolutions of the spindle axis by operating an override, etc. during machining.

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